QRadar API and AQL Query with Wild Card Not Working?

I'm attempting to query the API and normally things work great, but now that I try using a like '%something%' it fails saying

{"http_response":{"code":422,"message":"The request was well-formed but was unable to be followed due to semantic errors"},"code":8,"description":"","details":{},"message":"Missing required parameter \"query_expression\" from query parameters"}